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03-22-2008, 06:51 PM
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| Chemistry question?
Some cracker tins include a glass vial of drying material in the lid. This is often a mixture of magnesium sulfate and cobalt chloride indicator. As the magnesium sulfate absorbs moisture (MgSO4 · 1H20 -----> MgSO4 · 7h20), the indicator changes color from blue to pink ( CoCI2 · 4H20 ------> CoCi2 ·6H2O). When this drying mixture becomes tottaly pink, it can be restored by heating in the oven. What 2 changes are caused by the heating? please show the work. i will award the ten points. thx      |
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